I’m not going to go into detail about how to setup hass.io on a Raspberry PI, their site does an excellent job of describing how to get it installed, but I do highly recommend using that installation method if you’re on the fence. Raspberry PIs are inexpensive and Home Assistant runs quite well on the platform.

Instead, I’m going to concentrate on what it takes to get this working while going over what you need to enable in hass.io to support a small, WiFi enabled board sending temperature and humidity readings.